Quote:
Originally Posted by rrobson
On my last car I had a 0.5A drain which turned out to be the alternator. It was charging but obvious had a fault.
Easiest way to check is get someone to help and pull a fuse at a time. That will give you a rough idea what circuit is drawing. Could also be a relay stuck on. Does the car have sat nav?
|
You have sort of confirmed what i suspect - despite the RAC man who came out to test the battery, under warranty, saying the alternator was fine i looked on line - there is simple test for a failing alternator diode - set the multimeter to AC voltage and then switch engine on - then apply to the battery terminals -should be no AC current at all- am getting an AC 30 v reading -so looks like a failing diode which can cause battery drain.